+AC_ARG_WITH([docbook], [AS_HELP_STRING([--with-docbook],
+ [enforce XML to man page compilation @<:@default=check@:>@])
+AS_HELP_STRING([--without-docbook],
+ [skip XML to man page compilation @<:@default=check@:>@])],
+ [],
+ [with_docbook=check])
+
+AC_ARG_VAR([DOCBOOK_TO_MAN], [docbook2x-man command])
+AS_IF([test "x$with_docbook" != xno],
+ [AC_CHECK_PROGS([DOCBOOK_TO_MAN], [docbook2x-man docbook2man docbook-to-man],
+ [if test "x$with_docbook" != xcheck; then
+ AC_MSG_ERROR([Required program 'docbook2x-man' not found.])])])
+
+AM_CONDITIONAL(WITH_DOCBOOK, [test x${DOCBOOK_TO_MAN} != x])
+